A 1/8 inch pilot hole followed by a 3/4 inch dia hole to be drilled in end of a 3.875 inch dia shaft.Calculate the RPM of each drill. % _1 l- w0 m/ h- h5 Z) K9 S% WNote: CS=80/ J, r: _9 c( B7 _- r+ |) h4 N4 b
' a# W# G$ s0 A6 l3 p7 v
RPM 1/8=7 D6 C' H, R8 c
RPM 3/4=/ j1 A% Y' J4 o/ t% P, v